:root {
    --bg: #ffffff;
    --fg: #1d1d1f;
    --muted: #6e6e73;
    --accent: #0a66d8;
    --card: #f5f5f7;
    --border: #d2d2d7;
    --code: #eef0f3;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #111113;
        --fg: #f5f5f7;
        --muted: #a1a1a6;
        --accent: #4c9dff;
        --card: #1c1c1f;
        --border: #38383d;
        --code: #26262b;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
}

header, main, footer {
    max-width: 860px;
    margin: 0 auto;
    padding: 0 16px;
}

header nav {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    align-items: center;
    padding: 18px 0;
    border-bottom: 1px solid var(--border);
}

header nav .brand {
    font-weight: 700;
    margin-right: auto;
    color: var(--fg);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1 { font-size: 2.2rem; line-height: 1.2; margin: 48px 0 12px; }
h2 { margin-top: 40px; }
p.lede { font-size: 1.2rem; color: var(--muted); max-width: 640px; }

.buttons { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0; }

.button {
    display: inline-block;
    padding: 10px 18px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--fg);
    font-weight: 600;
}

.button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 14px;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px 18px;
}

.card h3 { margin: 0 0 6px; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); }

code, pre {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    background: var(--code);
    border-radius: 6px;
}

code { padding: 1px 5px; font-size: 0.92em; }
pre { padding: 12px 14px; overflow-x: auto; }

table { border-collapse: collapse; width: 100%; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }

.note { color: var(--muted); font-size: 0.95rem; }

footer {
    margin-top: 64px;
    padding: 24px 16px 48px;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 0.9rem;
}